socket.py 文件源码

def _init_sock(self):
        if self.unix_socket:
            # try remove the sock file it already exists
            _sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
            try:
                _sock.connect(self.unix_socket)
            except (socket.error, OSError) as err:
                if err.args[0] == errno.ECONNREFUSED:
                    os.unlink(self.unix_socket)
        else:
            _sock = socket.socket(self.socket_family, socket.SOCK_STREAM)

        _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
        if hasattr(socket, "SO_REUSEPORT"):
            try:
                _sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEPORT, 1)
            except socket.error as err:
                if err[0] in (errno.ENOPROTOOPT, errno.EINVAL):
                    pass
                else:
                    raise
        _sock.settimeout(None)
        self.sock = _sock